Transcriptomic identification and developmental mapping of nrg3b expression in zebrafish

<i>nrg3b</i> exhibits stage-dependent upregulation and preferential enrichment in excitatory neuronal regions during development, with sustained expression in adult telencephalon. These findings suggest a potential role for Nrg3b in synaptic organization and provide a foundation for future studies on the Nrg3b-ErbB4 signaling axis in zebrafish neurodevelopment.